Drilling Coilspring Mount - Photo 15

14. With the old springs removed, don’t forget to run a 5⁄16-inch drill bit through the center of the spring-pad for installation of the included 2-inch bumpstop spacers. One of the great things about a Rubicon Express system is that you’re able to forego the process of scouring the inter-web in search of all the knick knacks you’ll need to complete your install. The Extreme-Duty kit includes everything you’ll need as far as suspension and steering are concerned.